Rock drill mounting



June 20, 193 c. A. HULTQUIST 1,914,430

ROCK DRILL MOUNTING Filed May '7, 1950 2 Sheets-Sheet l INVENTOR fl/m/ems A. HULTQU/ST ATTORNEY June 20, 1933. c HULTQUIST 1,914,430

ROCK DRILL MOUNTING Filed May '7, 1950 2 Sheets-Sheet 2 INVENTOR C/m 1.55 Aj uL-mu/sr ATTORNEY Patented June 2%, 1933 NETE 3 'ATES tenet CHARLES A. HULTQUIST, F 130$ ANGELES, CALIFORNIA, ASSIGNOR T0 INDEPENDENT PNEUMATIC TOOL CQMFANY, 0F CHICAGO, ILLENOIS, A CORPORATION OF DELAY'TARE ROCK DRILL MOUNTING Application filed May 7,

My present invention relates to rock drills, and particularly to mountings of and for rock drills, and particularly adapted for min ing operations. 7

The objects of this invention are: first, to provide a novel mounting for supporting ordinary or other rock drills of the lighter types in various positions as required in the several mining operations, such as in tunnel- 10 ing, stoping, and the like, thus serving sub stantially as a universal support for the rock drill in various positions; second, to provide a very light and portable and durable mounting of this class for supporting either a spe- 1 cial rock drill or one of the common type of rock drills of the lighter type; third, to provide a mounting of this class which may be set on the floor of the tunnel for drilling a hole in the upper portion of the face thereof, which may be supported by a rod mounted in the hole previously drilled in the upper portion of the face of the tunnel for drilling a hole in the lower portion of the face of the tunnel, and whereby the mounting may be supported on the floor of the tunnel with a drill directed upwardly in alignment with the mounting for drilling a hole in a stope or raise; fourth, to provide a mounting of this class whereby the drill may be easily raised and lowered while being directed into the face of the tunnel or while drilling in a stope or raise; fifth, to provide novel means for supporting the mounting on the face of the tunnel when desiring to drill holes in the lower portion of the face; sixth, to provide a novel yoke mounting for the rock drill whereby the same may be held in a transverse position relative to the mounting for horizontal drill- 40 ing, and which may be readily shifted by reason of the yoke to a vertical position in alignment with the supporting means or column, and whereby the drill may be turned about the yoke through at least half a circle for directing the drill in the opposite direction, primarily when suspending the mount ing; seventh, to provide an apparatus of this class whereby the rock drill is pivotally supported intermediate its ends at one side of its longitudinal axis whereby the rock drill itself 1930. Serial No. 450,348.

tends to assume a horizontal position at all times; eighth, to provlde a novel crank and screw means for extending or contracting the supporting column longitudinally for adj ustclass which is simple and economical of construction, efficient, and which will not readily deteriorate or get out of order.

With these and other objects in view, as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions, as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this application in which:

Figure 1 is a side elevational view of my drilling apparatus showing the mounting supporting the drill in a position for drilling a horizontal hole in the face of a tunnel, certain portions of the mounting being broken away and in section to facilitate the illustration; Fig. 2 is a fragmentary elevational view thereof taken at 22 of Fig. 1 showing the relation of the supporting yoke for the rock drill relative to the supporting column; Fig. 3 is a fragmentary elevational View of my drilling apparatus showing the mounting in a slightly modified form of construction; Fig. 4 is a side elevational View of the apparatus shown in Fig. 1, but with the drill shifted to the vertical position for drilling a vertical hole in a stope or raise, also showing a portion broken away and in section to facilitate the illustration; Fig. 5 is another side elevational view thereof showing the mounting inverted for drilling a hori zontal hole at the lower port-ion of the face of a tunnel; and, Fig. 6 is a fragmentary sectional View thereof taken at 66 of Fig. 5.

Like characters of reference refer to similar parts and portions throughout the views of the drawings.

The mounting of my drilling apparatus, as shown in the drawings, consists essentially of a hollow column member 1, a supporting screw 2 extending into the normally upper end of the column member and screwably mounted therein, a crank 3 secured to the upper end of the screw 2, a yoke 4 pivotally mounted on a vertical axis at its lower end in alignment with the screw 2 above the crank 3, and a handle 5 extending laterally from the yoke 1, and av collar 6 encircling the column member 1 and provided at diametrically opposite sides with supporting trunnions 6a.

The column member 1 is preferably of tubular construction having at its normally lower end a spur 1a for anchoring the lower end in the floor A of the tunnel. The spur 1a is long and sharp extending transversely of the column member 1 and holds not only the column member from slipping on the floor of the tunnel, but also prevents the same from turning when adjusting the supporting screw 2 relative thereto. The screw 2 is of relatively large size and is adjusted relative to the column member 1 by the crank 3 having a gripping portion 3a of such length to accommodate a mans hand. At the opposite side of thecrank from the screw 2 and in alignment therewith is a vertical bearing 7 about which is journaled a hub 8 extending downwardly from the yoke 1. This yoke is in U-form with the connecting portion 4a of its legs 46 at the lower end of the yoke. To this cross or connecting portion 4a is secured the hub 8. The handle 5 consists of a handle portion 5a and a bolt portion 56, the latter extending transversely through each of the legs 4?) at the lower portions thereof and is secured in position thereto by anut 9. The handle portion 5a extends to the side of the yoke for steadying the mounting.

The rock drill, designated 10, may be of any desirable light construction and is pivotally mounted intermediate its ends on the upper ends of the arms 4?) of the yoke. The pii'otal connection of the yoke to the rock drill housing is preferably at one side of the longitudinal axis of the rock drill so that the latter is suspended from the yoke and assumes normally a horizontal position, as shown in Figs. 1 and 5.

\Vhen desiring to drill a vertical hole in a stope or raise of a tunnel or cavity, the rock drill is shifted about its pivotal mounting until the same assumes a vertical position in substantial alignment with the supporting screw 2 and column member 1, that is, in substantial alignment with the supporting column for the rock drill. In order to secure the rock drill in this position, the handle member 5 is removed from the yoke and reinserted with the bolt portions 5?) thereof extending through the hollow handle 10a of the drill, as shown best in Fig. 4. The rock drill is usually provided with a hose connection 11 extending from the side thereof, as shown in Fig. 4.

In order to permit the rock drill housing to be positioned in a vertical position so that the hose connection 11 and the throttle handle 12 may clear the yoke, the arms of the yoke are offset laterally, as shown in Figs. 1 and 5.

The mounting shown in Fig. 5 for supporting the drill for drilling a hole in the lower portion of the face of a tunnel, is identical with that described above. In this instance, however, the mounting is not supported on the floor of the tunnel, but is suspended from the trunnions 6a carried by the collar or clamp 6 adjustably secured around the column member 1. These trunnions are supported on a rod 13 which is extended with one end into a hole B drilled in the face of the tunnel. at the upper portion thereof. The opposite end of the rod 13 is bifurcated, as shown in Fig. 6, and the furcations of this bifurcated portion are provided at their upper sides with recesses 13a in which the trunnions 6a are placed and pivoted. Thus, only one additional element is employed for drilling holes in the lower portion of the face C of the tunnel. It will be noted that the support may be inserted in a lower hole and the drill supported therefrom in an upright position, that is, above the support so as to drill horizontally or vertically, as desired, with the drill supported upon the trunnion rather than the spur at the end of the column member 1.

It will be noted that the rock drill housing, in this instance, is also suspended from the yoke with its pivotal axis above the longitudinal axis of the rock drill housing. In order to permit the rock drill to be shifted in this manner, the length of the yoke between the pivotal connection thereof with the rock drill housing and the inner end of the yoke is of such length that the rock drill housing can be conveniently swung with its drill steel end between the arms of the yoke. F

In the modified structure, shown in Fig. 3, the trunnions 14 for supporting the mounting in an inverted position are secured directly to the column member 1 instead of to an adjustable collar or clamp. In this instance, also there are provided several pairs of trunnions to permit the mounting of the column member in various positions on the supporting rod or bracket 13.

In this modified structure, I have also shown a modified form of supporting the yoke 15 which, in this instance, is provided with only one arm. This arm is also pivotally supported at its end to one of the bolts 16 which secures a pair of clamps 17 around the barrel of a rock drill which may not be provided with supporting trunnions, pins, or bolts, as indicated by 106 in the preferred structure.

Though I have shown and described a particular construction, combination and arrangement of parts and portions of my drilling apparatus, and certain modifications thereof, I do not wish to be limited to this particular construction, combination and arrangement, nor to the modifications, but desire to include in the scope of my invention the construction, combination and arrangement substantially as set forth in the append ed claims.

Having thus described by invention, what I claim as new and desire to secure by Letters Patent is:

1. In an apparatus of the class described, a longitudinally extensible support having a yoke at one end, and a rock drill pivotally mounted intermediate its ends at the extended ends of the yoke and adapted to swing therein, the handle end of the rock drill being secured to and at the inner end of the yoke for mounting the rock drill in substantial alignment with the support.

2. In an apparatus of the class described, a longitudinally extensible support having a yoke at one end, a rock drill pivotally mounted intermediate its ends at the extended ends of the yoke and adapted to swing therein, and a handle on the support for steadying the same, said handle extending through the handle end of the rock drill for securing the rock drill in alignment with the support.

3. In an apparatus of the class described, a supporting means having at one end an extended yoke provided at the ends thereof with journal portions, the sides of the yoke being ofiset to one side of the general longitudinal axis of the yoke and the supportin means, and a rock drill pivotally mounted intermediate its ends on the journal portions of the yoke and adapted to extend transversely thereof, said rock drill having at one end a hose connection, said rock drill being adapted to be aligned with the yoke and the hose connection thereof to extend into the oifset portion of the yoke when the rockdrill is aligned with the yoke.

4. In an apparatus of the class described, the combination with a pneumatic drilling means including a handle at one end having a bore therethrough traversing the longitudinal axis of the drilling means, of a longitudinally variable supporting rod, a yoke at one end thereof adapted to support the drilling means intermediate its ends so as to permit rotation thereof until the drilling means is in axial alignment with the supporting rod and the drilling end is extended, a gripping means traversing and projecting laterally from the base portion of the yoke adjacent the supporting rod, the axis of the gripping means being in registry with the handle of the drilling means, the traversing portion of the gripping means adapted to be threaded through the bore of the handle and thereby secure the drilling means in its extended axially aligned relation with the supporting rod.

5. In an apparatus of the class described;

the combination with a pneumatic drilling means having a handle at one end including a keeper element, of a longitudinally variable with the keeper element for securing the drilling means in its extended axially aligned relation with the supporting rod.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 29th day of April, 1930.

CHARLES A. I-IULTQUIST. 

